Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 64 for “"Oligomerisation"”.
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The oligomerisation of propene over nickel oxide silica alumina
… oxide sil ica alumina catalyst. The propene oligomerisation activity and the selectivity of the catalysts prepared by homogeneous decomposition deposition (HDD) were investigated and compared with nickel oxide silica alumina catalysts prepared by the techniQues of impregnation (IMP) and …
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Investigation of the function, pharmacology and oligomerisation of GPR40, GPR41 and GPR43
… receptors, their pharmacology, function and oligomerisation was investigated during this study. A [35S]GTPgammaS binding assay was developed to monitor the activation of GPR41 using a GPR41-Gαi3 Cys351Ile fusion protein. Using the fusion protein improved the signal to background ratio and …
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Factors involved in the oligomerisation of cyanide dihydratase from Bacillus pumilus C1
Includes abstract. Includes bibliographical references.
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Development of new late transition metal catalysts for the oligomerisation of ethene
The oligomerisation of ethene to linear l-alkenes is an important industrial process. The recent discovery of iron and cobalt bisiminopyridyl and nickel and palladium a-diimine catalysts for the polymerisation and oligomerisation of l-alkenes has stimulated interest in the use of late transition …
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The effect of oxygenates on the oligomerisation of propene over zeolite ZSM-5
The oligomerisation of alkenes such as propene and butene represents an important route to the production of environmentally clean transportation fuels. When these olefins originate from Fischer-Tropsch product streams they are often contaminated with small amounts of oxygenates such as acetic …
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The deactivation of Zeolite-Y and mordenite during hexane cracking and propene oligomerisation
… at 1 atmosphere and high pressure propene oligomerisation provided two different reaction types. The transport properties of the catalysts were compared by measuring adsorption and diffusion using the GC technique with ancillary information obtained from ammonia TPD, mercury porosimetry and …
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Factors involved in the oligomerisation of the cyanide dihydratase from Bacillus pumilus C1
… and investigate the role of the histidines in oligomerisation with aid of the structure. Using Cryo-electron microscopy techniques a three dimensional reconstruction structure of purified CynDₚᵤₘ was obtained at a resolution of ~5Å. By flexibly fitting a CynDₚᵤₘ homology model into this high …
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The development of a model for high pressure propene oligomerisation over H-ZSM-5
… mathematical model for high pressure propene oligomerisation over H-ZSM-5. To this end, this introductory chapter first revises the characteristics and applications of catalysts which have been shown to be active for oligomerisation. This is further split into acid catalysts, heterogeneous …
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Development of Pd(II)- and Pt(II)-based catalysts for polymerisation and oligomerisation of [alpha]-olefins
The polymers were investigated by DSC and TGA to determine their melting point endotherms and thermal stability. All polymers exhibited low thermal stabilities and low melting point endotherms.
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Spectroscopic studies of Metal(II) complexes and application of the Ni(II) complexes to olefin oligomerisation catalysis
… prepared above was tested as a catalyst for the oligomerisation of 1-hexene. The experiments were carried out in batch at 40°C using toluene as solvent. Four different Lewis acid cocatalysts were tested and nickel : co-catalyst ratios of 1:1 and 1:10 were used. The effects of Lewis acid strength …
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Aggregation of alpha-synuclein using single-molecule spectroscopy
… abundance and a remarkable sensitivity of the oligomerisation process to the chosen experimental conditions. In this thesis, well-established single-molecule techniques have been utilised to study the aggregation and oligomerisation of αS in solution.
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Regulation of mammalian IRE1α: Co-chaperones and their importance
… the ER membrane to the nucleus by promoting oligomerisation of IRE1, a conserved transmembrane ER stress receptor. Despite significant research, the mechanism of coupling ER stress to IRE1 oligomerisation and activation has remained contested. There are two proposed mechanisms by which IRE1 …
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The DNA Binding Protein Lsr2 from Mycobacterium tuberculosis
… β-sheets, revealing a mechanism of protein oligomerisation. Oligomerisation only occurs after the removal of the first three residues M1, A2 and K3. In solution, protein oligomerisation was recreated with trypsin, resulting in the formation of large protein complexes. A change in DNA …
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Visualisation of innate immune signalling complexes in cells by cryo-electron tomography
… is forming a signalling platform through oligomerisation in cells. RIG-I-like receptors (RLRs), RIG-I, MDA5 and LGP2 sense cytosolic viral dsRNA and then promote oligomerisation of the mitochondrial antiviral- signalling protein (MAVS) on the outer mitochondrial membrane. MAVS signalling …
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Phenylacetylene oligomers as synthetic information molecules
… forming properties, and attempts at templated oligomerisation reactions. The new synthetic information molecule is based on the phenylacetylene oligomer framework developed by Moore and co-workers. Recognition was achieved via a base-pair that is made from a single point high affinity H-bond, …
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Biophysical Studies of Protein Assemblies
… properties. The interplay between disorder, oligomerisation and function is the focus of this thesis. Some IDPs fold conditionally upon interacting with a partner protein; a process known as coupled folding and binding. What are the biophysical advantages and consequences of disorder in the …
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Metallkomplexe als Katalysatoren für selektive Olefinoligomerisierungen
… to be applied for ethylene and propylene oligomerisation. A group of tridentate imino-ligands was synthesised, which includes the 2,6-bis(imino)pyridines 1-2, the 2,6-diacetyl-monoiminopyridine 3, the iminophosphines 16, and the imidazo[1,5-a]pyridines 23c and 24a, and others, obtaining a …
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Structural and Biochemical Characterisation of the HR1 domains of the Protein Kinase C-related kinase family
… by the identification of some HR1 domains as oligomerisation domains of their respective PRK. Analysis of the oligomeric state of the single, di- and tri-domains indicates that the three HR1 domains are not independent in solution. The NMR solution structure of the PRK1 HR1c domain is solved, …
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Studien zur Quervernetzung von Milchproteinen und zur Bildung individueller Crosslink-Aminosäuren
… Eigenschaften des Produktes. Die für die Oligomerisation verantwortlichen Strukturen sind bisher nur zum Teil bekannt. Daher soll in dieser Arbeit zunächst das Ausmaß der Quervernetzung in einer größeren Anzahl an handelsüblichen Milchprodukten ermittelt und mit den für diese Proben …
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Molecular Mechanisms of Protein Self-Assembly and Aggregation
… monomers interact with each other, finding that oligomerisation into amorphous aggregates is driven largely by hydrophobic, non-specific forces. We then move on to probing the aggregation of A$\beta_{42}$ into amyloid structures using a native-centric coarse-grained model, and explain the results …
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